When I invoke qplot, I get the following error: Error in rename.default(x, .base_to_ggplot) : object '.data' not found I would appreciate any advice. sessionInfo: R version 2.10.0 (2009-10-26) i386-pc-mingw32 locale: [1] LC_COLLATE=English_United States.1252 [2] LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages: [1] grid grDevices datasets splines graphics stats [7] tcltk utils methods base other attached packages: [1] epicalc_2.10.0.0 ggplot2_0.8.3 reshape_0.8.3 [4] plyr_0.1.9 proto_0.3-8 MCMCpack_1.0-4 [7] coda_0.13-4 polycor_0.7-7 sfsmisc_1.0-8 [10] mvtnorm_0.9-8 xtable_1.5-6 prettyR_1.5 [13] lme4_0.999375-32 Matrix_0.999375-31 effects_2.0-10 [16] colorspace_1.0-1 nnet_7.3-1 mvnormtest_0.1-7 [19] gmodels_2.15.0 gtools_2.6.1 latticeExtra_0.6-4 [22] lattice_0.17-26 RColorBrewer_1.0-2 doBy_4.0.5 [25] foreign_0.8-38 rms_2.1-0 e1071_1.5-20 [28] class_7.3-1 car_1.2-16 mitools_2.0 [31] MASS_7.3-3 svSocket_0.9-48 TinnR_1.0.3 [34] R2HTML_1.59-1 Hmisc_3.7-0 survival_2.35-7 loaded via a namespace (and not attached): [1] cluster_1.12.1 gdata_2.6.1 svMisc_0.9-56 tools_2.10.0 Respectfully, Frank Lawrence